docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/Q/QUEST_DATA.h

@@ -0,0 +1,15 @@
+#pragma once
+
+namespace RE
+{
+	class QUEST_DATA
+	{
+	public:
+		// members
+		float         questDelayTime;  // 00
+		std::uint16_t flags;           // 04
+		std::int8_t   priority;        // 06
+		std::int8_t   questType;       // 07
+	};
+	static_assert(sizeof(QUEST_DATA) == 0x8);
+}